Electrical properties of lead-free Fe-doped niobium-rich potassium lithium tantalate niobate single crystalsYang Li, Jun Li, Zhongxiang Zhou, Ruyan Guo and Amar S. BhallaEPL, 104 5 (2013) 57008DOI: https://doi.org/10.1209/0295-5075/104/57008